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1、template

<!-- 本示例未包含完整css，获取外链css请参考上文，在hello uni-app项目中查看 -->
<template>
	<view>
		<view class="uni-common-mt">
			<view class="uni-form-item uni-column">
				<view class="title">可自动聚焦的input</view>
				<input class="uni-input" focus placeholder="自动获得焦点" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">键盘右下角按钮显示为搜索</view>
				<input class="uni-input" confirm-type="search" placeholder="键盘右下角按钮显示为搜索" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">控制最大输入长度的input</view>
				<input class="uni-input" maxlength="10" placeholder="最大输入长度为10" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">实时获取输入值：{{inputValue}}</view>
				<input class="uni-input" @input="onKeyInput" placeholder="输入同步到view中" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">控制输入的input</view>
				<input class="uni-input" @input="replaceInput" v-model="changeValue" placeholder="连续的两个1会变成2" />
			</view>
			<!-- #ifndef MP-BAIDU -->
			<view class="uni-form-item uni-column">
				<view class="title">控制键盘的input</view>
				<input class="uni-input" ref="input1" @input="hideKeyboard" placeholder="输入123自动收起键盘" />
			</view>
			<!-- #endif -->
			<view class="uni-form-item uni-column">
				<view class="title">数字输入的input</view>
				<input class="uni-input" type="number" placeholder="这是一个数字输入框" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">密码输入的input</view>
				<input class="uni-input" password type="text" placeholder="这是一个密码输入框" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">带小数点的input</view>
				<input class="uni-input" type="digit" placeholder="带小数点的数字键盘" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">身份证输入的input</view>
				<input class="uni-input" type="idcard" placeholder="身份证输入键盘" />
			</view>
			<view class="uni-form-item uni-column">
				<view class="title">控制占位符颜色的input</view>
				<input class="uni-input" placeholder-style="color:#F76260" placeholder="占位符字体是红色的" />
			</view>
      <view class="uni-form-item uni-column">
				<view class="title"><text class="uni-form-item__title">带清除按钮的输入框</text></view>
				<view class="uni-input-wrapper">
					<input class="uni-input" placeholder="带清除按钮的输入框" :value="inputClearValue" @input="clearInput" />
					<text class="uni-icon" v-if="showClearIcon" @click="clearIcon">&#xe434;</text>
				</view>
			</view>
			<view class="uni-form-item uni-column">
				<view class="title"><text class="uni-form-item__title">可查看密码的输入框</text></view>
				<view class="uni-input-wrapper">
					<input class="uni-input" placeholder="请输入密码" :password="showPassword" />
					<text class="uni-icon" :class="[!showPassword ? 'uni-eye-active' : '']"
						@click="changePassword">&#xe568;</text>
				</view>
			</view>
		</view>
	</view>
</template>

2、script

<script>
export default {
    data() {
        return {
            title: 'input',
            focus: false,
            inputValue: '',
            showClearIcon: false,
            inputClearValue: '',
            changeValue: '',
            showPassword: true
        }
    },
    methods: {
        onKeyInput: function(event) {
            this.inputValue = event.target.value
        },
        replaceInput: function(event) {
            var value = event.target.value;
            if (value === '11') {
                this.changeValue = '2';
            }
        },
        hideKeyboard: function(event) {
            if (event.target.value === '123') {
                uni.hideKeyboard();
            }
        },
        clearInput: function(event) {
            this.inputClearValue = event.detail.value;
            if (event.detail.value.length > 0) {
                this.showClearIcon = true;
            } else {
                this.showClearIcon = false;
            }
        },
        clearIcon: function() {
            this.inputClearValue = '';
            this.showClearIcon = false;
        },
        changePassword: function() {
            this.showPassword = !this.showPassword;
        }
    }
}
</script>

3、温馨提示
当比较输入框内的数值大小时，由于输入的类型为string，所以比较的时候需要转换为数值类型Number()
if(Number(this.num1) > Number(this.num2)){
…
}